December weather forecast
Ithaca, NY

A stream of water flowing downstream from the Taughannock Waterfall in Ithaka, New York
A stream of water flowing downstream from the Taughannock Waterfall in Ithaka, New York

Weather in December

December, the first month of the winter in Ithaca, is also a wintry month, with an average temperature fluctuating between 33.6°F (0.9°C) and 24.1°F (-4.4°C).

Temperature

In December, the average high-temperature drops from a chilly 44.1°F (6.7°C) in November to a wintry 33.6°F (0.9°C). In December, in Ithaca, the average low-temperature is 24.1°F (-4.4°C).

Humidity

The average relative humidity in December is 86%.

Rainfall

In December, the rain falls for 9.3 days. Throughout December, 2.36" (60mm) of precipitation is accumulated. In Ithaca, New York, during the entire year, the rain falls for 164.2 days and collects up to 32.56" (827mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Ithaca, New York, in December, snow falls for 16 days, with typically accumulated 6.77" (172mm) of snow. Throughout the year, there are 82.1 snowfall days, and 34.57" (878mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 8min of daylight.
On the first day of the month, sunrise is at 7:15 am and sunset at 4:34 pm. On the last day of December, in Ithaca, New York, sunrise is at 7:35 am and sunset at 4:42 pm EST.

Sunshine

In Ithaca, New York, the average sunshine in December is 2.9h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 1 in December transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Ithaca?

The average high-temperature, in December, in Ithaca, New York, is 33.6°F (0.9°C), while the average low-temperature is 24.1°F (-4.4°C).

What is the average humidity in December in Ithaca?

The average relative humidity in December in Ithaca, New York, is 86%.

How many days does it rain in December in Ithaca?

In Ithaca, in December, during 9.3 rainfall days, 2.36" (60mm) of precipitation is typically accumulated.

How many days does it snow in December in Ithaca?

In Ithaca, in December, during 16 snowfall days, 6.77" (172mm) of snow is typically accumulated.

What is the month with the shortest days in Ithaca?

December has the shortest days of the year in Ithaca, New York, with an average of 9h and 8min of daylight.

How many hours of daylight does Ithaca have in December?

In December, the average day length in Ithaca is 9h and 8min.

When is the sunrise / sunset in December in Ithaca?

On the first day of December, sunrise is at 7:15 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:42 pm EST.

How many hours of sunshine does Ithaca have in December?

In Ithaca, the average sunshine duration in December is 2.9h.

When is the lowest UV index in Ithaca?

January and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index reading in December in Ithaca?

In December, the average daily maximum UV index in Ithaca, New York, is 1. A UV Index estimate of 2, and below, represents a minimal hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Ithaca, NY

Average temperature in December - Ithaca, NY
  • Average high temperature in December: 33.6°F

The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (27.9°F).

  • Average low temperature in December: 24.1°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).

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Average pressure in December
Ithaca, NY

Average pressure in December - Ithaca, NY
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Ithaca, NY

Average wind speed in December - Ithaca, NY
  • Average wind speed in December: 9.5mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

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Average humidity in December
Ithaca, NY

Average humidity in December - Ithaca, NY
  • Average humidity in December: 86%

The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April and May (79%).

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Average rainfall in December
Ithaca, NY

Average rainfall in December - Ithaca, NY
  • Average rainfall in December: 2.36"

The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is November (1.97").

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Average rainfall days in December
Ithaca, NY

Average rainfall days in December - Ithaca, NY
  • Average rainfall days in December: 9.3 days

The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (6.4 days).

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Average snowfall in December
Ithaca, NY

Average snowfall in December - Ithaca, NY
  • Average snowfall in December: 6.77"

The month with the highest snowfall is February (8.35").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Ithaca, NY

Average snowfall days in December - Ithaca, NY
  • Average snowfall days in December: 16 days

The month with the highest number of snowfall days is January (18.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Ithaca, NY

Average daylight in December / Average sunshine in December - Ithaca, NY
  • Average daylight in December: 9h and 8min

The month with the longest days is June (Average daylight: 15h and 14min).
The month with the shortest days is December (Average daylight: 9h and 8min).

  • Average sunshine in December: 2h and 54min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 2h and 30min).

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Average sunshine days in December
Ithaca, NY

Average sunshine days in December - Ithaca, NY
  • Average sunshine days in December: 8.5 days

The month with the most sunshine days is September (14.2 days).
The month with the least sunshine days is February (6.8 days).

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Average UV index in December
Ithaca, NY

Average UV index in December - Ithaca, NY
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in December
Ithaca, NY

Average cloud cover in December - Ithaca, NY
  • Average cloud cover in December: 72

The month with the most cloud cover is February (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 38).

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Average visibility in December
Ithaca, NY

Average visibility in December - Ithaca, NY
  • Average visibility in December: 5mi

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).

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